Space

From the design of the first breathing regulator for Project Mercury, to a full suite of hardware and cutting-edge pneumatic subsystems for the ISS, Cobham has engineered some of the most complex, challenging space components in existence today. Cobham builds ultimate reliability into life support...

Air

Many of the world’s best known aircraft, including the F-35 and all Airbus platforms, feature Cobham technology. From internet in the sky through to jamming and missile guidance for the latest fighter aircraft, Cobham has an innovative suite of avionics, communication and navigation products for an...

Land

From lightweight composite CNG tanks for automotive, to wireless coverage in the world's tallest building, Cobham has a variety of land based solutions for commercial and defence applications. Our advanced Ground Penetrating Radar detection, and secure communications support security forces and...

Maritime

Cobham’s maritime communications provide reliable communications in the toughest maritime conditions. We provide satcom and radio for the Volvo Ocean Race and microwave and radar technology for the AEGIS class cruiser. Cobham also offers an innovative range of safety and survival equipment, includi...

SAILOR VPA 30 AM-FM

The SAILOR VPA 30 is an active omni-directional antenna optimized for AM reception from 0.1-30 MHz with vertical polarisation.

The electronics performs a two stage impedance transformation
between the E-field at the rod and the 75 ohm cable. A Ka value of
0.16 means that at all frequencies, the antenna is as efficient as
a full size dipole. The design of the complete antenna is made in
such a way, that for most of the listening time (day-night and
seasonal variations) the external, atmospheric noise, masks the
noise generated by the electronics. The design is fine tuned in
this respect and neither rod diameter nor rod length should be
altered.

Power is fed to the antenna via the coaxial cable, which floats
with respect to ground at the antenna end, except for a 3nF/3 kV
decoupling capacitor between the coax shield and body. The circuit
has adequate protection against lightning. There are no serviceable
parts inside